/*
 *  fx/PictureGlow.h
 *
 *  Copyright 2009 Peter Barth
 *
 *  This file is part of Milkytracker.
 *
 *  Milkytracker is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Milkytracker is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Milkytracker.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef PICTUREGLOW__H
#define PICTUREGLOW__H

#include "FXInterface.h"
#include "Filter.h"

class PictureGlow : public FXInterface
{
    private:
        unsigned short* pictureBuffer;

        int scale, resShift;

        unsigned short* glowBuffer1;
        unsigned short* glowBuffer2;
    public:
        PictureGlow (int w, int h, int rShift, unsigned short* picture) :
            resShift(resShift),
            pictureBuffer(picture)
        {
            width = w;
            height = h;
            scale = 0;

            glowBuffer1 = new unsigned short[w * h];
            glowBuffer2 = new unsigned short[w * h];
        }

        ~PictureGlow ()
        {
            delete glowBuffer1;
            delete glowBuffer2;
        }

        void setScale(int scale) {
            this->scale = scale;
        }

        virtual void render(unsigned short* vscreen, unsigned int pitch)
        {
            int x, y;

            unsigned int* dstDW = (unsigned int*)vscreen;
            unsigned int* srcDW = (unsigned int*)pictureBuffer;

            for (y = 0; y < height; y++)
            {
                for (x = 0; x < width >> 1; x++)
                {
                    *dstDW = *srcDW;
                    srcDW++; dstDW++;
                }
                dstDW += (pitch - width) >> 1;
            }

            Filter::glow(vscreen, width, height, pitch, glowBuffer1, glowBuffer2, resShift, scale);
        }

        virtual void update(float syncFrac) {
            scale -= (int)(syncFrac * 1024.0f); if (scale < 0) scale = 0;
        }


};

#endif